Stop mechanism.



. i. GL.

APPUCATION s SHEETS-SHEET E, L. GOLD STOP MECHANISL APPLIS/mw man AUG. r2. 19m.

3 SHEETSHSHEET .ation nled .eregast concern f it known l, lehnten. lll. .,fonn, a citizen of the United Sta. es, residing at Brooklyn, in the county oi Kings and State of New York, have invented certain new and useful improvements in Stop Mechanism; and lf do declare the following to be a full, clear, and exact description of the invention, such-as will enable others skilled in the art to `which it appertains to make and use the saine.

My invention .relates to useiul improvements in stop mechanisms for knitting machines and the like and has for its object to improve upon the general construction of devices of this character to'such an extent as to'providc extremely simple and comparatively inexpensive construction, which, although possessing these characteristics, `will be highly efficient and durable.

V llilith this general object in view, the invention resides incertain novel features of construction and in unique combinations of parts to be hereinafter' fully described and claimed, the de. riptife matter being augrei'erence to tl accompanying mented ly drawings 'wherein I Figure l. is arear elevation of a portion oi a knit machine showing the application of inve ition to use, the several parts of such inven -on being so disposed as to alloriY the machine to operate; Fig. 2. `is a view similar to ljbut illustratingthe positions of parts when the stop mechanism comes into operation; 3 is a detail vertical transverse section as viewed on the plane indicated by the line 3--3 of Fig-'1, showing more particularly the normal position of the circuit closer to be described.; Fig. 4 is a. View similar to Fig. 3 but illustrating the position of parts'upon breakage of the yarn or thread; Fig. 5 is yet another view similar to Fig.. 3 and showing the manner in which the circuit closer operates when excessive Istrain is placed upon the yarn; Fig. 6 is a horizontal section as viewed on the plane designated by the line 6-6 of Fig. 3; Fig. 7 is a perspective view Aof the circuit closinCr mechanism; Fig. 8 is an additional per tive view lisclosing the construc'no.e ce.. t ie shaft shifting mem- Specification Dif Letters Patent.

siriane f it .irl il- Patented d une 2'?, 19%.

1915. Serial No. $5,178.

ber to be described; Fig. 9 is a detail vertical transverse section as seen along the plane designated by the line 9 9 of Fig. 1, but showing more particularly the vbrake mechanism; Figs. l0 and 11 are horizontal sections as seen on the plane of the line 10-10 of Fig. 9 showing different positions of parts; Fig. 12 is a diagram showing a portion of another type of knitting machine to which the invention may be applied.

` ln referring to the accompanying drawused to designate corresponding parts throughout the several Views, F indicating the frame of a common type of knitting machine known to the art as the .American liull fashioned knitting machine. This machine includes a power driven shaft-S which may be rotated either by the electric motor M as disclosed iin-Figs. 1 and 2, or by the belt B running normally upon the tight pulley P, but shift-able to a loose pulley P .-(sce Fig. l2)

iS or the equivalent thereof is employed for.

breaking the circuit of the motor when desired, said' switch being shown in the present applications as provided with an operating arm A. which is secured by a set screw or the like to the longitudinally shiftable control shaft C of the machine. lf, on the other hand, thebelt B be employed, a belt shifter A may Well be secured to the shaft C whereby when the latter is shifted in the proper direction, the belt Will be moved from the ixed pulley P to the loose pulley P', thus checking rotation of the shaft S under power, it being evident that the same final result is obtainable by shifting of the switch S by proper manipulation of the shaft C, if such switch be employed. p

The construction of the parts so far brieiy described forms no part of the prescnt invention, .but is disclosedlmerely for the purpose of showing the stoaction` between such parts and the improved features which are designed to shift the shaft C in such a direction as to discontinue rotation of the shaft S under power, upon predetermined occurrences, such for instance as the prevalence ci excessive strain upon the yarn or thread or the breakage of such thread. To this end, the construction now to be described is provided. y

' Having an opening through which the controlling shaft C is `normally free to slide,

is a shaft shifting member 1 having a nose or the like 2 which is normally engaged by a pivoted catch 3 whereby to retain a coil' springl 4 under tension, said spring being inter osed between one end of the member 1 an one of' the usual fixed bearings of the shaft C. By means yet to be described, the

catch 3 is retracted upon predetermined occurrences, whereby to allow the spring 4 to forcibly project the member -1 into contact witha stop collar or the like 5 secured to the shaft C, thus shifting said shaft from y the position seen in Fig. 1 to that disclosed .'in Fig. 2. This Shifting of the shaft eitherl opens the switch S to break the'circuit of the motor M or moves the belt shifter A to shift the belt B 'from the fixed to the loose pulley, according to the design of the machine; In either case, however, the result is that rotation of the shaft S under power is checked. Needless to say, however, the shaft S will not cease to rotate immediately upon releasing of the driving means thereof,

l. it being therefore highly expedient to prothe fork 7 as most clearly depicted in Fig.

vide an effective speed arresting brake aplplied'to use simultaneously with the shifting of the shaft C by the spring 4. For this purpose, practically any preferred type of brake may be provided, but the post 6 pref-l 9. The ends of the split brake ring 8 are shown in the present application as rising in parallelism and as connected at their upper ends by a. coil spring 10. their intermediate portions being normally spacedV by the toggle links 11 when disposed in the position illustrated in Fig. 10. the outer endsI of said links being'pivoted to the free ends of the ring 8 whlle their inner ends are con nected to ahead 12 on one end o' a longitudinally disposed rod 4155, the latter being vtitl slidably mounted in a hanger 14 which depends from the shaft C and having its opposite end secured in any preferred manner lto an `rm 15 which is disclosed in the present application as depending from the tubular member l and as having a guide fbi-k 1G which looselyen'iln'aces the shaft S, whereby to-retain the arm 15 and the meinber 1 in proper relation to the remaining.,T parts of the device. at all times.

" ly the construction just described, when the member l is so shifted as to either open the switch S -or shift the belt B onto thc loose pulley, as the case may be, the toggle links 11 will be moved from the position seen in Fig. 10 to that disclosed in Fig. 11, thereby contracting the split brake` ring 8 around a brake pulley 8 which is fast on the shaft S, the result being that not only is the tension of the spring 4 exerted to apply the brake forcibly, but the islpring 10 now` likewise comes into actiont ereby quickly arresting rotation of the shaft S and thus discontinuing operation of the entire machine. f

It may be desirable to so prevent operation of the machine for a number of reasons, but in the present embodiment of the invention, this only takes place either when the thread or yarn Y breaks or when excessivelstrain is placed thereon which might cause breakage, a uniquely, constructed 5 strain and breakage detector D being pro- `vided for so doing. This detector is so constructed as to allow the same to close the circuit of a pair of electro-magnets 17 when excessive strain on the yarn or breakage thereof occurs, the aforesaid magnets 17| being positioned adjacent the pivoted catch 3, whereby when said magnets areyenergized, they will immediately release said catch, whereupon the stop mechanism comes into action in the manner above set forth.

The detector above mentioned is shown in the present embodiment of the invention as supported upon a hanger 18 which depends from a rail 19 extending longitudinally throughout substantially the entire length of the knitting machine, such machine being considered as formed of a number of independent units as is common in machines ot this class, in which instance a post 18 depends from the rail 1f) adjacent 'each unit, each one of said posts carrying one 'of the detectors l). However. since the construction of all of these devices is the same, but one is shown in the accompanying drawings and will now be described.

Positioned in rear oi the hanger 18, and having a forwardlv extending ear 20a pivoted to the lower end thereof. is a. horizontally disposed oscillatory barl 20 from -one side ot' which a plurality of parallel fingers 21 .project horizontally, While from the opposite side of said bar, a weighted arm 22 extends laterally. The opposite ends of the bar 20 are shown in the present embodiment of the. invention as provided with upstanding ears 23 between which an additional horizontally positioned oscillatory bar 24 is pivoted, one side ol said har being equipped with a plurality of outstanding right-angular fingers 25 which are intermeshed with the fingers 21 as clearly disclosed in Figs. 6 and 7, while projecting from the opposite side oi: said bar 24, is an additional weighted arm 26 which is spaced above and to one side of the arm 22.

Under normal Workin-p; of the machine, the yarn Y is passed h' h the fingers 2l.

and over the fingers 25? whereby a reliable tension is placed on id yarn and whereby the two arms 22 and 2o are held normally spaced equi -distantly from a contact 27 which projects therebetween, (see more particularly Figs. 3 and 7). lllhen, however. breakage of the yarn occurs, the uppermost Weighted arm 26 is allowed to descend onto the Contact 27, thus completing the circuit of the magnets, l? (see Fi 4i) through appropriate Wiring 'yet to "he described. On the other hand, when excessive strain is placed upon the. the entire detector is rocked to the position. disclosed iii Fig. 5, whereupon the lowergmost weighted arm 22 is presented to the Contact il? thus likewise completing the eireuit of the, magnets i7. Regardless of the manner in which this circuit he completeda the result is releasing of the catch 3, projection of the member "l to discontinue rotation, olf the shaft S, under power, and the immediate application of the brake mechanism to further rotation of said shaft S By this manner of Operation, imperfections in the Weave as Well as entanglements et the yarn or thread are prevented, as wiii be readily understood to those skilled in the art 'to which the inventien relates, Wit out requiring a more extended explanation.

As illustrative of one simple manner of providing an electric eircnit to he eon1-- pieted by the detertor D.; the drawings illustrate in diagrama, an eleetrie battery Si! from one pole of which one one terminal of 'die magnets 17. `While from; the other pole of said battery a Wire 33 eti-A tends to the pivot o? the ear 2G, this ear as well as aii parte oi@ the deteetor with the eX- eeotion the i8. being ot' sach constrnetion. as to allow the current to pass reeiy therethrough. Connecting the other terrniral of "he magnets '1? and the contact 32 an ad 'orial wire 33. Thos it will he evident that Ween one of the weighted arms' above deserihed is 'presented a gainst the rontaet C27.. the Current will fiow from the 'oattery 3! to the ear 0a. thenee through the. aeti've arm to Contact 2T, from which it ws thi `rire to the magnets 'i7 energ' the same. and returning to the hat "rough the wire 3i. 'it is to heunderthat airingr just desrrihed is y ill for the purpose of disrhising are. ei'aistruetion and need tel too eiose 1 results. andin i .as have heen do nt that i need details 'wire 3l leads to Aprojef-ted when not lio limited theretoj otherwise than to the extent to ahr/h the appended claims re slrirt me.

l rlaiin;

i. ln romhinai'ion, a sha it shil'tintf,` ineinher haring lherein an opening'7 a poner rntout shaft shift-aldo, longitudinally through said openingr to control the power, ay spring` hearing' against the aforesaid memher. a eateh normally holding said niemher retrarted against the tension oisaid spring'. means to release. the, eatrh, and a stop on the sha l't into Contact with which the aforesaid sha lt shifting nieniher is pro lieted when released7 nherehy to mechanically shilt the shaft.

Q. ln eoinhii'iation. a power driven shaft. a speed arresting;` hr-alre therefor, a shaft shifting' ineinher haring therein an opening, a power ent-out shaft slidahlei'reelythrourjh said openinU.` a spring` hearing against the aforesaid member, a eatrh retaining said member retraetril against the. tension of they spring. releasingv ini-ans for said rati-ii. a stop on he po\\'er ont-ont shaft against wliirh the shaft shifting naniher is pro'ieeted when released. whereby to nnwhanirally shift said power eut-ont shaft to diseootinuf.: rotation of the driven sliait under power, and a liralze appljiine1 arin projeeting: lat* orally from the shaft shitting nieinher and havineonneetion with the aforesaid iii-alie wherel'iyrto appl)7 the latter upon projection ot' said niemlier7 and to tliereiore arrestrotation of said driven shaft.

.in minhination. a power driven shaft. 1 )eed arresting.;r la'alre therefor., a shalt shifting' n'ieniher haring' therein an open ing, a poner ent-out shalt slidalile freely through said opening', a spring hearing; against the aforesaid moniher. a (fateli retaining;W said niemher retracted against the tension of' the spring. releasing means 'for said oateh. a. stop on the power eut-oatshaft against which the shaft shilti'rng.` ineinher is released. whereby to me chaniealir shift said power cutout shaft to diseoniinne rotation ol. the driven shaft nn der power. a oralre applyiiig: arm profeet ingr 'allil from the shait shitting inem her to the power driven shaft and having eonoortion with the brake Vwher-elw to appl)v the latter upon proliertion of said mein lier and to thereby arrest rotation of said driven shaft. and a lguide on said arm slid4 ahle on said power driven shaft.

in testimony whereof l' have hereunto set and in prrsenee, of two suliseriliingavitneses.

'ansia i.. All

illitnes" ,r 4 ms. liirricri, 

